Trout Boss Green / Yellow

The Trout Series Trout Boss is our most versatile trout line. Whether you find yourself indicator fishing, casting dry flies or throwing streamers, this line will perform flawlessly. Built a full line size heavy to match fast modern action rods. Our HTx technology seals our dirt particles to prolong the life of your line. 

- Quick Loading 
- High Floating 
- Easy Casting

WATER: Freshwater
LINE: Floating
TAPER: Weight Forward
LENGTH: 100ft
CORE: Braided Nylon Multifilament 
SPECIES: Trout 

Color GREEN / YELLOW
Size WF2F
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Trout Boss Breakdown

From tiny spring creeks to large rivers, the Trout Boss is up to the challenge. We developed the Trout Boss to be our most versatile trout line.

The Trout Boss taper excels whether you are indicator fishing, casting dry flies or throwing streamers. Our Trout Boss is built a full line size heavy to match fast modern action rods, generating maximum power and reducing the number of false casts.

The newly designed, thinner core gives the line a smaller diameter to mass ratio, increasing shoot ability. The Heat Tempered Surface (HTX) coating seals out dirt and particles that can hinge your shooting ability. The HTX coating keeps your line floating high and performing flawlessly. If you are looking for a rock solid, all around trout line, the Trout Boss taper will make your time on the water more efficient and effective.

SPECIES: Trout / Grayling / Steelhead / Salmon


WATER LINE DENSITY TAPER CORE
Freshwater Floating Weight Forward Braided Nylon Multifilament

LINE SIZE GRAIN WEIGHT HEAD LENGTH TOTAL LENGTH
WF 2 100 gr. 35 ft. 100 ft.
WF 3 120 gr. 35 ft. 100 ft.
WF 4 140 gr. 35 ft. 100 ft.
WF 5 160 gr. 35 ft. 100 ft.
WF 6 185 gr. 35 ft. 100 ft.
WF 7 210 gr. 35 ft. 100 ft.

Trout Boss

Learn more details about Cortland's Trout Boss Fly Lines

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Technologies

Dual Welded Loops Technology Icon
DUAL WELDED LOOPS

Welded loops make rigging fast, easy and reliable. Cortland loops are strong, secure and durable.

Shooting Technology Icon
SHOOTING TECHNOLOGY

ST coating delivers a reduced-friction performance with a glass-smooth finish and remains a key element in line slickness over its life span.

Heat-Tempered Surface Treatment Technology Icon
HEAT-TEMPERED SURFACE TREATMENT

A process that incorporates extreme slickness additives. Seals out dirt and oils while maintaining an exceptionally low friction coefficient.

Cold Temperature Technology Icon
COLD TEMPERATURE

Ideal use in 30-50 degree (F) temperatures.

Warm Temperature Technology Icon
WARM TEMPERATURE

Ideal use in 50 - 70 degree (F) temperatures.

FAQ

Our Trout Boss is built for cold water environments and will perform best in temperatures between 30 and 70 degrees (F). Our HTX coating locks out dirt and grime while remaining slick and supple in the coldest conditions.

The taper design for our Trout Boss was built overly aggresive to punch through wind and effortlessly turn over streamers, nymph rigs and long leaders paired with dry flies. The short body and short rear taper allows for minimal false casts while achieving maximum distance. The short front taper will turn over any large streamer or tandem fly rig. This line is built overweighted for quick loading and fast shooting.

The green and yellow finish distinguishes taper change, identifies loading point and is easily traceable in freshwater environments.

Cleaning your fly line is very important especially when fishing saltwater. Simply pull line off your reel into a clean bucket or tub of freshwater. Put roughly 1oz or more of Cortland’s Line Cleaner solution onto a clean rag or towel. Firmly squeeze the towel with Pro Line Cleaner around the line and slowly pull line through the towel. You should be able to see dirt or discolored streaks on the towel when finished.

Learn more about Cortland's Fly Line Cleaner Lubricant & Pads.

average rating 4.5 out of 5
Based on 4 reviews
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75% of reviewers would recommend this product to a friend
4 Reviews
Reviewed by Nick Fly F.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Nothing butThe Best.

Great line and enjoy the easiness of it.

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Reviewed by Evan K.
Rated 3 out of 5
Review posted

Decent

Wanted to up my line from the 444 classic, and got better casts but the line did not make it 3 months before the coating started to deteriorate and eventually broke on a fish. Was great for those 3 months though!

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Reviewed by Gary T.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Boss Trout

Love this line, may never buy anything else again in any size they offer

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Reviewed by Dave "Rocky" R.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

Efficient, dependable & great bang for the buck

Great product. As a guide I need equipment that works. Cortland provides the confidence I and my clients need!

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Master Versatility on the Water with Trout Boss Green / Yellow

If you’re chasing trout across a variety of water conditions, the Trout Boss Green/Yellow is your ultimate ally on the water. At Cortland, we designed the Trout Boss to be an incredibly versatile fly line in our trout series, built specifically to perform in any scenario—from the delicate precision required in spring creeks to the raw power needed to tackle fast, wide rivers. Whether you’re indicator fishing with nymphs, casting dry flies with finesse, or throwing streamers into deep runs, this line delivers the precision, strength, and adaptability to meet every angler’s needs.

What truly sets the Trout Boss apart? For starters, this fly line is designed a full line size heavier, making it the perfect match for fast-action rods. This ensures quick and efficient loading, offering exceptional control and accuracy, even in dynamic fishing environments or when battling wind. Its advanced taper design incorporates a long head and refined front taper to provide maximum power for extended casts, while also reducing the need for excessive false casting. The result? More time fishing, less time adjusting your line. The Trout Boss truly offers the versatility to adapt to any fishing technique or condition, making it a must-have for any angler chasing trout.

But we didn’t stop there. The Trout Boss features a thinner core and an optimized diameter-to-mass ratio, which enhances its shootability and ensures smoother, more accurate casts. The line’s Heat Tempered Surface (HTx) coating is another game-changer. This innovative coating technology not only delivers superior floating performance and reduced friction, but also drastically improves durability. The HTx coating actively repels dirt and grime, keeping your line slick, responsive, and ready for action—even after countless hours of casting. Whether you’re targeting trout, grayling, salmon, or steelhead, this line’s performance and reliability will elevate your angling experience.

The Trout Boss Green/Yellow isn’t just a fly line—it’s a tool that helps you fish more effectively and confidently in every situation. Its blend of versatility, precision, and advanced engineering ensures you’re always prepared, whether you’re fishing remote mountain streams, wide western rivers, or everything in between. With the Trout Boss, you can step onto the water knowing you’re equipped with gear that combines innovation and reliability to help you make the most of every outing.

The Cortland Difference: A Legacy of Excellence

For over a century, Cortland has been at the forefront of crafting premium fly-fishing lines—a legacy of experience and innovation that anglers around the world trust. Our dedication to quality is unmatched, and our expertise in manufacturing fishing lines extends far beyond the water. In addition to creating some of the finest fly-fishing lines available, we’ve applied our knowledge of advanced fibers and coatings to industries like medical and aerospace. This commitment to precision and innovation has made us an industry leader, not just in fishing but in advanced material science.

Today, we offer over 450 different fly lines, all proudly made right here in the USA. Each line is carefully designed, tested, and manufactured to ensure it meets the highest standards of performance and durability. Whether you’re a seasoned angler fine-tuning your approach or a beginner just starting your fly-fishing journey, Cortland has the gear to help you succeed. For those new to the sport, our Fairplay product line provides beginner-friendly kits with everything you need to start casting with confidence.

At Cortland, we believe fly fishing is more than just a hobby—it’s a passion, a tradition, and a way to connect with nature and yourself. That’s why we remain committed to delivering gear that enhances your time on the water, making every trip unforgettable. When it comes to fly fishing, trust Cortland’s dedication to quality and performance to elevate your experience, one cast at a time.